Regeneration is least likely to occur in the:
A)CNS of a frog
B)PNS of a frog
C)CNS of a mammal
D)PNS of a mammal

Question

Quizplus · Accepted Answer

The CNS (central nervous system) of a mammal, including humans, has limited ability to regenerate after injury. This is due to the nature of the cells in the CNS and the scar tissue that forms after injury. The PNS (peripheral nervous system) in both mammals and frogs has a greater ability to regenerate, with damaged neurons able to regrow along the axon pathways. While some regeneration may occur in the CNS of a frog, it is not as likely as in the PNS.

Regeneration Is Least Likely to Occur in The